Add one more nail in the coffin. A University of Central Florida professor, Costa Efthimiou, has mathmatically proven that vampires could never really exist. His logic goes:

On Jan 1, 1600, the human population was 536,870,911. If the first vampire came into existence that day and bit one person a month, there would have been two vampires by Feb. 1, 1600. A month later there would have been four, and so on. In just two-and-a-half years the original human population would all have become vampires with nobody left to feed on.
If mortality rates were taken into consideration, the population would disappear much faster. Even an unrealistically high reproduction rate couldn’t counteract this effect.
“In the long run, humans cannot survive under these conditions, even if our population were doubling each month,” Efthimiou said. “And doubling is clearly way beyond the human capacity of reproduction.”

Obviously Dr. Efthimiou is himself a vampire and is trying to pull the black cape over our eyes with his so-called “math.” We shall not be fooled. Furthermore, anyone that saw “Interview with the Vampire” knows that not every person bit becomes a vampire. Most people are just drained of blood and die. Only a chosen few become vampires. That just negates his whole theory. Come on!

There is a great academic book on vampires called “Vampired, Burial, and Death”, which has perhaps the best footnote in an academic text. Attached to a passage regarding the reports of vampires screaming when decapitated with a shovel, the footnote says something to the effect of “I hardly ever have occasion to behead a corpse with a shovel.”